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column with TTL of 10 seconds lives very long...
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Hi!
I have Cassandra cluster with 3 node running version 1.0.11.
I am using Hector HLockManagerImpl, which creates a keyspace named
HLockManagerImpl and CF HLocks.
For some reason I have a row with single column that should have expired
yesterday who is still there.
I tried deleting it using cli, but it is stuck...... more »
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Creating namespace and column family from multiple nodes concurrently
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Hi all, I am implementing a distributed application which runs on 100s of machines concurrently. This application is going to use Cassandra as underlaying storage. The application creates the schema (name space and column families) during initialization phase. It seems I have two options to create the schema.... more »
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exception causes streaming to hang forever
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We had 3 nodes roll on good and the next 2, we see a remote node with this exception every time we start over and bootstrap the node
ERROR [Streaming to /10.10.42.36:2] 2013-05-22 14:47:59,404 CassandraDaemon.java (line 132) Exception in thread Thread[Streaming to /10.10.42.36:2,5,main]
java.lang.RuntimeException: java.io.IOException: Input/output error... more »
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RS crash upon replication
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Hi,
This is bad ... and happened twice: I had my replication-slave cluster
offlined. I performed quite a massive Merge operation on it and after a
couple of hours it had finished and I returned it back online. At the same
time, the replication-master RS machines crashed (see first crash
[link]) with the first exception being:... more »
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Simple but Reliable configuration for pseudo distributed mode on ubuntu
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I have not been able to bring up a simple standalone hbase pseuo
distributed mode cluster on a single ubuntu 12.x machine. A couple of
co-workers that have been using hbase for years also looked at it and we
have not been able to resolve.
Before I jump in to the details, i'll just say : "hey is there a pointer to... more »
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For those using Cassandra from .Net
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NativeX is giving a talk about using Cassandra with .Net. Our firm created
a port of Hector over to .Net late last year.
Here is the abstract.
*The Perils and Triumphs of using Cassandra at a .NET/Microsoft Shop*
*Speakers:* Derek Bromenshenkel and Jeff Smoley, Infrastructure Architects
at NativeX... more »
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precommit hooks crash log
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Hi,
According to the documentation erlang precommit hook crashes should be
logged into sasl-error.log. But ...
* That log doesn't seem to be in use, sasl crashes are logged to crash.log
* Still, precommit crashes seem to have debug level, not crash level
So am I really confused or is the documentation outdated?... more »
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High performance disk io
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Hello,
We're looking at deploying a new ring where we want the best possible read
performance.
We've setup a cluster with 6 nodes, replication level 3, 32Gb of memory, 8Gb
Heap, 800Mb keycache, each holding 40/50Gb of data on a 200Gb SSD and 500Gb
SATA for OS and commitlog
Three column families... more »
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Risk about RS logs clean ?
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Hi,all
I want to know how RS eliminates the unnecessary hlogs.
lastSeqNum stores <RegionName, latest KV Seq id>
and
outputfiles stores <last Seq id before new hlog file, file path>
So, how does rs guarantee that the kv in the hlog to be cleared have been
already flushed from memstore into hfile.... more »
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